chore: fix some formatting and grammar nits (#16803)

Author: mmalerba

src/material-experimental/mdc-menu/harness/mdc-menu-harness.ts

@@ -11,7 +11,6 @@ import {coerceBooleanProperty} from '@angular/cdk/coercion';
 import {MatMenuItemHarness} from './mdc-menu-item-harness';
 import {MenuHarnessFilters} from './menu-harness-filters';
 
-
 /**
  * Harness for interacting with a MDC-based mat-menu in tests.
  * @dynamic

src/material/autocomplete/autocomplete-trigger.ts

@@ -361,8 +361,8 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, AfterViewIn
                fromEvent(this._document, 'click') as Observable<MouseEvent>,
                fromEvent(this._document, 'touchend') as Observable<TouchEvent>)
         .pipe(filter(event => {
-          // If we're in the Shadow DOM the event target will be the shadow root so we have to fall
-          // back to check the first element in the path of the click event.
+          // If we're in the Shadow DOM, the event target will be the shadow root, so we have to
+          // fall back to check the first element in the path of the click event.
           const clickTarget =
               (this._isInsideShadowRoot && event.composedPath ? event.composedPath()[0] :
                                                                 event.target) as HTMLElement;